Regulating device



Feb. 6, 1923. 1,444,564.

A. M. SMITH. HEGULA TING DEVICE.

FILED IULYI6,I! 3I7- 2 SHEETSSHEET I- DRAFT INDICATOR 7 K v I ffiwe rzii A. M. SMITH. REGULATING DEVICE.

Feb. 6, 1923.

2 SHEETSSHEET Z.

FILED JULY [6, 1917.

' fuzz/6716975 ARTHUR Ill. SMITH, 03E CLEVELAND, OHIO.

REGULATING- DEVICE.

Application filed JuIy 16, 1917. Serial 1W0. 160,700.

To all whom it may concern:

Be it known that l, fin'rnon M. Smrrit, a citizen of the United States, residing at Cleveland, in the county of Cuyahoga and State of Ohio, have invented a certain new and useful Tmprovement in Regulating Devices, of which the following is a full, clear, and exact description.

This invention relates to a controlling apparatus for use with a heating furnace or similar apparatus in connection with which fluid fuel and air are supplied to the furnace, and in which the passage of fuel gases to a stack or flue are controlled.

The object of the invention is to provide an apparatus of the characterdescribed in which by a unitary apparatus the supply of fuel and air as well as the passage of line gases to the stack are controlled so that an interdependent relationship when once established, may be maintained.

Generally speaking, the invention may be said to comprise the elements and combinations thereof set forth in the accompanying claims.

Reference should be had to the accompanying drawings forming a part of this specification in which in Fig. 1 there is somewhat diagrammatically shown the relationship between the parts to be controlled and the apparatus for controlling them, Fig. 2 is a front elevation with portions in section of a furnace with which is associated the regulator of my invention; Fig. 3 is a side elevation with portions in section of the construction shown in Fig. 1.

The apparatus is more particularly intended for use in connection with furnaces in which coal is coked, or materials are heated or calcined, although it will be apparent that the apparatus is susceptible of other and more varied use.

In a coking furnace or calcining furnace, the furnace itself as is well known, comprises a retort or oven A which is usually heated through the instrumentality of gas burned with a proper quantity of air, the burning taking place adjacent the walls of the oven so that the oven is heated.

The products of combustion are usually conducted from the furnace through checker brick-work or passageways such as B, and thence to a stack or flue.

The gas, which in burning is utilized to and the apparatus herein described contemplates, in the event that the gas supplied is from a producer, the use of a connection WillCll will control the supply of air, and possibly the supply of steam also, to the producer so that the quantity of gas produced in the producer may be controlled.

All such heating furnaces as that to which reference has been made, require some control with respect to the passage of the burned gases or products of combustion to the flue, for the stack draft has an important bearing upon the heating of the retort chamber of such a furnace.

For purposes of more ready understanding of the invention it is explained that the pipe 1 is connected in some suitable manner with the combustion chamber or line of a furnace such as a line B and a portion of the burned gases or products of combustion will passthrough the pipe 1.

Associated with the pipe 1 is a hollow receptacle 2 having a chamber 3, the products of combustion passing into the chamber 3, and from the chamber 8 to a pipe 4 W1 ich is connected to a larger pipe 5, which is a flue for conducting products of combustion from the furnace and which is connected with the stack 6. It will be noted that the pipe a in effect communicates di rectly with the stack 6, for its connection with the pipe 5 is beyond the damper 5 shown therein, so that the suction effect upon the pipe is the same as that in the stack 6.

The pipe 5 is directly connected with that portion of the furnace through which the products of combustion pass, and receives the products of combustion from the charm her in which they have been burned, or from the regenerative checker brick-work through which they mayhave passed, and the passage of the products of combustion from the furnace through the pipe 5 is con trolled by the damper 5 At 7 there is represented a conduit having an opening which is controlled by a damper 8, and at 9 a second conduit is shown, having an opening which is controlled by a damper 10. The portions 10 and 11 which are associated with the pipe 9, are simply control passageways connecting with the furnace.

The pipe 9 may be described as a conduit through which air is supplied to the furnace by means of a conduit 9 to support COll'1 similar device 12. Similarly the damper 8' is'bya connection S CORHGCtBCl with the part 12, andtheldamper 5 is also connected with the part -12 so that as the part 12 be moved in one direction or the other, the

dampers 10 and 8 will be moved to close or open thepassages which they control, and the same is true with respect to the damper 5 The rod 12 extends within the casing 13 and i's'operated to move in one direction by means of a spring 1% which surrounds the end oi the rod "12 which is within the casing 13. The end of the rod engages with a flexible diaphragm 15 winch extends trans-- versely with respect to the casing 13, and with the top part oi the casing 13 forms a chamber.

This chamber communicates with a thermostatic device comprising-atube 16, which tube'in turn communicates with a vessel 17 containing a fluid such as air or any other suitable fluid which upon heating, expands. This receptacle 17 is surrounded in part by the'casing 2'so that the fluid content of the receptacle 17 is heated by the hot gases which pass through the pipe 1.

Expansion of the fluid within the receptacle 17, which fluid, of course, fills the pipe 16'and the chamber formed above the dia supplied to the heating chamber orretort.

Consequently a rise in the temperature of the flue gases above a predetermined point, clearlyindicates the necessity for diminishing the supply of fuel gas and of air which is burned to heat the retort.

It will be obvious that increase in the temperature of the gases passing through the chamber 3 will expandthe fluid within the receptacle 1?, which will inturn cause the rod 12 to be depressed and thereby move the dampers l0, 8 and 5 to close to a certain degree, tl1e openings which they control. This would mean that the amount vot'iuel gas supplied to the furnace would be diminished as Well as the quantity of air supplied for the combustion of that gas, and also the draft suction between the staclra-nd the furnace will be decreased by the operation oi? the damper 5 The various operations which have just been described, when e1"?- tected will result in causing a lowering of the temperature or" the heating furnace or retort. Obviously the reverse operation of the rod 12 will result in the opposite condition taking place.

In the previous part of the specification l have'reterred to the conduit 7 as-an air and possibly steam conduit through which these elements are supplied to a producer. It will be obvious that this conduit 7 may receive gas from any sourcewhich is supplied to the furnace to be heated, under suchcircumstances'the gas thus supplied will be con trolled. by the damper 8, a nd whether the conduit 7 befortlle purpose of supplying air to a producer or of supplying gas directlyto the-heating furnace, the functional relationship with respect to the air supply through the conduit 9 as well as the controlled relationship with respect to the damper 5 is the same, The pipe thas inserted therein a damper 20, this damper being moved in or out bya handle 21 so as to controlthe passage of the products of combustion which pass through the pipe i. Inconnection with the pipe 4 there is a draft gauge or indicator 22 whichanay be of any preferred type and as its name indicates, will shOW the suction produced by the gases passing through the pipe 4.

It will be obviousthat by manipulation of the damper 20 the suction in the pipe's may be controlled so as to keep that suction uniform if this be desired.

This control of the gases passing through the pipe 1, has its effect upon the thermostatic device as will readily be understood, so that the'regulation of the furnace may be accomplished with the apparatus herein described and the effect of the stack draft con trolled as well. 1

Having described my invention, what I claim is:

1. The combination with a furnacehaving an air conduit with means for controlling the same and having a fuel I conduit and means forcontrolling the same, said furnace having a-"fiue, a damper in saidfiue, means 1 e ieece ing means a conduit conducting heated gases from the furnace to the said flue, said thermostatic device being associated with the last mentioned conduit and sensitive to the heat of gases passing therethrough.

2. The combination of a furnace having a flue gas conduit, a fine with which the said conduit connects, a damper in said flue conduit, a thermostatic device associated with said conduit, said furnace or provided with an air conduit and with a fuel conduit controlling means for said conduits, a common connection between the said controlling means and the aforesaid damper in the gas conduit, said connecting means being operatively connected with the thermostatic device to be moved thereby.

3. The combination of a furnace having" a conduit for conducting iiue gases with which the conduit connects, a associated with the said conduit whereby suction in said conduit may be maintained constant, a thermostatic device the heat sensitive part thereof associated with the said conduit and the gases passing therethrough, said furnace having an air cond it and a fuel conduit means associated wi each conduit for COHEYOHiIlg the same, common connecting means the damper and the aforesaid controlling means, said common connection being cperativeiy connected with the thermostat to be moved thereby.

in testimony whereof I hereunto MEX my signature.

ARTHUR SIVHTH. 

